[Bug] oclite: check_task polling floods output with repeated lines

[randomm]

Bug

The output shows repeated check_task tool calls flooding the screen:

◇ check_task tsk_c0019ddaf001Y0oaX0liu0v1W0
✓ check_task
◇ check_task tsk_c0019ddaf001Y0oaX0liu0v1W0
✓ check_task
◇ check_task tsk_c0019ddaf001Y0oaX0liu0v1W0
✓ check_task

This is the LLM agent polling for background task completion, generating massive visual noise.

Fix Options

1. Suppress repeated tool calls: If the same tool is called with the same arguments within N seconds, collapse into a single line with a counter: ✓ check_task ×5
2. Hide check_task entirely: Since we have anti-polling guidance in check_task.txt, the agent shouldnt be polling. But if it does, hide the visual noise.
3. Collapse consecutive identical tools: When tool_start matches the previous tool_start (same tool + same args), overwrite instead of appending.

Acceptance Criteria

• Repeated check_task calls dont flood the output
• Other tools still display normally
• bun run typecheck passes
• bun test passes

[randomm]

Fixed in ab9fad5 — dedup logic collapses repeated tool calls